IIT JAM
Madhumathy Asked a Question
July 17, 2020 11:52 ampts 30 pts
  • IIT JAM
  • Chemistry (CY)

Monosaccharides

these are monosaccharides they must follow the rules: 1) in aldolase all the central atoms are asymmetrical (chiral) 2)in ketose except 2nd carbon all molecules are asymmetrical. but it is found to contradict the rules by the structures that I have drawn. is my structure wrong? can you please clarify it to me?
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  • Priyanshu kumar Best Answer
    you draw it correct
    • cropped9050359496494305613.jpg
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  • Priyanshu kumar
    Dihydroxyketone is optically inactive monosachharides...it has no chiral centres. whereas glyceraldehyde is optically active having one chiral centre and thus two enantiomers are f...
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    Madhumathy
    so the rule d is being violated sir
    • cropped2646198818608031121.jpg
  • Madhumathy
    according to the rule C2,C4,C5 must be asymmetrical. but it is not so. because all of them aren't attached to 4different groups
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